Rocking-chair



(No Model.)

J' T- MITCHELL ROGKING CHAIR.

Patented Deo. 22, 1891.

UNITED STATES PATENTy OFFICE.

JAMES T. MITCHELL, OF MONTICELLO, NEV YORK.

ROCKlNG-CHAIR.

SPECIFICATION forming part of Letters Patent No. 465,719, dated December 22, 1891.

Application filed February 19,1891. Serial No. 382,065. (No model.)

To all whom t may concern.-

Be it known that I, JAMES T. MITCHELL, of Monticello, in the county of Sullivan and State of New York, have invented a new and useful Improvement in Rocking-Chairs, of which the following is a full, clear, and exact description.

My invention relates to an improvement in rocking-chairs, and has for its object to so construct a platform-rocker that a gliding rocking movement may be imparted to the chair-body, and whereby also the use of springs may be dispensed with.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective View of aplatformrocker constructed in accordance with my invention. Fig. 2 is a partial side elevation of the rocker. Fig. 3 is a partial vertical section through the rocker; and Fig. 4 is a perspective view of the lower portion of the rocker, illustrating a slightmodilcation in its construction.

The platform A of the rocker may be of any suitable or approved construction, and is provided at each side with, two independent bearing-points 10. The bearings are preferably roller-bearings, as illustrated, and the rollers are journaled upon suitable spindles secured, ordinarily, to the outer faces of the platform. rl`he body 12 of the chair when the roller-bearings are located upon the outer faces of the platform, is of sufficient width to fit over the platform, and in the under edge of the chair-body segmental surfaces 13 are produced, said surfaces being adapted to rest upon the bearings 10. A single segmental surface only, having a long sweep, may be produced at each side of the chair-body; but preferably two connecting segmental surfaces are employed at each side, as illustrated in the drawings.

The chair-body is held, in connection with the platform, preferably through the medium of brackets 14, which are rigidly attached to th e platform and extend upward'in front of tracks 15, secured to the lower portion of the chair-body, as illustrated in Figs. 1 and 3. The upper faces of the tracks 15 are preferably convexed and are engaged by frictionrollers 16, journaled in the upper ends of the brackets.

It will be observed that as the chair-body is supported upon roller-bearings and the surfaces of the chair-body engaging with the bearings are segmental when the chair is set in motion a rocking gliding movement will be imparted thereto free from the restrained movement consequent upon the use of the ordinary springs. Springs need not be employed at all in connection with the improved rocker, and if a spring is employed` as shown in Fig. 4, it is simply intended to facilitate the return movement of the chair-body and serve as a cushion therefor, and is never under undue tension, as the spring 17, when used, and, as shown in Fig. 4, is attached to a support located at the center of the platform and to the central portion of the chair-seat.

Then the chair is rocked forward upon the bearings, the forward rollers closely approach the point of intersection of the two segmental surfaces and the tendency is for-the said rollers to ret-urn tothe center of said surfaces, whereby the occupant of the chair-body is assisted in the return movement of the same. It will be further observed that by effecting a roller connection between the chair and its platform a minimum of friction is obtained and at the same time the chair and platform are effectively connected.

Having thus described my invention, I claim as new and desire/to secure by Letters Patent- 1. The combination, with the chair-body having the segmental surfaces 13 13 on the lower edge of each of its sides, the base and a pair of rollers 10 10 on each side of the base, one for each segmental surface, of the brackets 14, projecting up from the base between the rollers, a roller 16 on the upper part of each.

bracket, und tracks 15 on'the Chair-body between the surfaces 123 and engaged by the rollers 1G, substantially as set forth.

2. In a rocker, the combination, with a platform provided with two independent bearingpolnts at each side, of a Chair-body having segmental surfaces resting upon the said bearlng-points, and :L shifting connection between the platform and chair-body intermediate of said bearing-points and segmental surfaces, [o whereby the two are held together, as an d for the purpose specified.

JAMES l. MITCHELL. Witnesses:

MARTIN LA TOURETTE, CHARLES S. TUTTLE. 

